Computing and Library Services - delivering an inspiring information environment

Photochromic bi-naphthopyrans

Aiken, Stuart, Gabbutt, Christopher D., Heron, B. Mark and Kolla, Suresh B. (2015) Photochromic bi-naphthopyrans. Dyes and Pigments, 113. pp. 239-250. ISSN 0143-7208

Metadata only available from this repository.


A series of novel 3-aryl-(3,3-diaryl-3H-naphtho[2,1-b]pyran-8-yl)-3H-naphtho[2,1-b]pyrans has been accessed from 6-bromo-2-naphthol via a four step transformation. Acylation of the dianion derived from the treatment of 6-bromo-2-naphthol with n-butyllithium with Weinreb amides and subsequent reaction with a 1,1,-diarylprop-2-yn-1-ol gave 8-aroyl-3H-naphtho[2,1-b]pyrans in good yield. Addition of lithium trimethylsilylacetylide to the foregoing 8-aroylnaphthopyrans proceeded smoothly with base mediated desilyation to afford the target bi-naphthopyrans upon acid-catalysed reaction with 2-
naphthol. Preliminary evaluation of the photochromic response of the new bi-naphthopyrans revealed reversible independent naphthopyran ring-opening leading to a complex photochromic signature.

Item Type: Article
Subjects: Q Science > QD Chemistry
Schools: School of Applied Sciences
Related URLs:
Depositing User: Mark Heron
Date Deposited: 02 Sep 2015 09:52
Last Modified: 28 Aug 2021 11:53


Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©